6738399 has 6 divisors (see below), whose sum is σ = 9733256. Its totient is φ = 4492260.

The previous prime is 6738383. The next prime is 6738419. The reversal of 6738399 is 9938376.

It is a happy number.

It is not a de Polignac number, because 6738399 - 2⁴ = 6738383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6738349) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 374347 + ... + 374364.

Almost surely, 2^6738399 is an apocalyptic number.

6738399 is a deficient number, since it is larger than the sum of its proper divisors (2994857).

6738399 is a wasteful number, since it uses less digits than its factorization.

6738399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748717 (or 748714 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 6738399 is about 2595.8426377575. The cubic root of 6738399 is about 188.8798261832.

The spelling of 6738399 in words is "six million, seven hundred thirty-eight thousand, three hundred ninety-nine".